Popper's Swamp, Observation Statements, Facts/Interpretations Every test of a theory, whether resulting in its collaboration or falsification, must stop at some basic statement or other which we decide to accept. If we do not come to any decision, and do not accept some basic statement or other, then the test will have led nowhere…
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Basic statements are not justifiable by our immediate experiences, but are … accepted by an act, a free decision.
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Science does not rest upon solid bedrock. The bold structure of its theories rises, as it were, above a swamp. It is like a building erected on piles. The piles are driven down from above into the swamp, but not down to any natural or ‘given’ base; and if we stop driving the piles deeper, it is not because we have reached firm ground. We simply stop when we are satisfied that the piles are firm enough to carry the structure, at least for the time being. — Popper
Is anyone else reminded of Wittgenstein's later work here? Popper does not take the route of treating sense-data at the absolute which can falsify theories. Instead he talks of decisions. In his Logic, he uses the metaphor of a jury. I think he's trying to jump over the quicksand between language and the world apart from language. This 'swampy' element is something like 'common sense.' I imagine, for instance, everything that goes into a making a legitimate measurement, including one that falsifies a theory. Wittgenstein's discussion of the standard meter comes to mind. Popper admits or tolerates a dimness at the base of critical rationalism. — jas0n
It'd be great to hear your thoughts on Popper's swamp, which has hardly been touched. Observation statements are tricky! 'Experience' is pre-logical, one might say, since logic is about relationships between statements. Which statements count as basic (not needing justification by still other statements) is maybe unformalizable. Reminds me of On Certainty. — jas0n
My initial thought is that statements which count as basic are statements which have come to be accepted because they reflect what is common, most universal, to all of human experience. Is this "ecosystem" of 'self-evident' experience rightly captured in the metaphor of "swamp"? A swamp has no firm bedrock (which was Wittgenstein's metaphor for the set of hinge propositions which form the terrain over which the river of human life flows) to be found. We can touch the stream bed as it is more or less firm.
So, the question seems to be as to what is the difference between the two metaphors. Wittgenstein (if memory serves) allows that hinge propositions might change (as the river of human experience and judgement erodes here and silts up there). A swamp is an ecosystem thriving on a bed of fathomless ooze. Unlike Kant's sharp distinction between phenomena and noumena. the observability of the life of the swamp fades into the mud.
It has been pointed out by Sellars, McDowell and Brandom (following Hegel?) that, if sense experience is to be counted as justification for any propositional claims, it must be "conceptually shaped" all the way down. But what could this mean?
We know, on account of our very ignorance, that we are affected by the world at a pre-cognitive level; this means that, despite our ability to analyze the function of the various sensory structures via which we gain access to experience of a world, we cannot become conscious of this very most basic affectivity. It is ineluctably vague and subject only to our most recondite speculations.
So it is not consciousness which is most basic to our experience of a world, but unconsciousness, a primordial unfathomable affectivity.